PROBLEM TO BE SOLVED: To provide an opened/closed eye detection device for accurately calculating the degree of eye opening of a driver.SOLUTION: An opened/closed eye detection device 1 includes: face image acquisition means 3 for acquiring a face image of a driver eye opening quantity calculation means 7 for calculating the quantity of eye opening of the driver from the face image and eye opening degree calculation means 9 for calculating the degree of eye opening of the driver in accordance with the contrast result of the quantity of eye opening and predetermined reference eye opening quantity distribution. The opened/closed eye detection device 1 includes: storage means 15 for successively storing the quantity of eye opening and reference eye opening quantity distribution setting means 15 and 17 for dividing a group of the quantity of eye opening stored in the storage means 15 into a plurality of groups in accordance with an order stored in the storage means 15, and for calculating the distribution of the quantity of eye opening in each group, and for setting the distribution of the quantity of eye opening belonging to the plurality of groups as the reference eye opening quantity distribution under conditions that the variation of the distribution of the quantity of eye opening among groups is within a predetermined range.COPYRIGHT: (C)2013,JPO&INPIT【課題】運転者の開眼度を正確に算出できる開閉眼検出装置を提供すること。【解決手段】運転者の顔画像を取得する顔画像取得手段3と、前記顔画像から前記運転者の開眼量を算出する開眼量算出手段7と、前記開眼量と、所定の基準開眼量分布との対比結果に応じて、前記運転者の開眼度を算出する開眼度算出手段9と、を備える開閉眼検出装置1であって、前記開眼量を順次記憶する記憶手段15と、前記記憶手段15に記憶された前記開眼量の群を、前記記憶手段15に記憶された順に従って複数のグループに分け、各グループにおける開眼量の分布を算出し、その開眼量の分布の各グループ間におけるばらつきが、所定の範囲内に収まっていることを条件として、前記複数のグループに属する開眼量の分布を、前記基準開眼量分布として設定する基準開眼量分布設定手段15、17と、を備えることを特徴とする開閉眼検出装置1。【選択図】 図1
